As a user I would like trestle to (optionally) remove plurals from name when using trestle author docs create-sample

[butler54]

Issue description / feature objectives

This is not high priority, however, I believe it is a nice feature, and could have a minimal implementation (or quite a sophisticated one).

• trestle author docs setup -tn decisions
• When I run trestle author docs create-sample -tn decisions rather than creating
  • decisions/decisions_001.md ideally it would be good to create decisions/decision_001.md
• Similar could be true for acronyms:
  • trestle author docs setup -tn ADRs -> ADRs/ADR_001.md

Three ways this could be created:

1. Optional (or not) behaviour for stripping trailing s from the name
2. Using a library that can 'deplural' words (e.g. https://pypi.org/project/inflect/) -
3. Add a stem/prepend argument to create sample (allowing flexibilty)
   1. For the top scenario that would result in trestle author docs create-sample -tn decisions --stem decision`

I would put this as a post 1.0.0 feature.